We investigate theoretically multimode electromechanical "shuttle" instabilities in dc voltage-biased nanoelectromechanical single-electron tunneling devices. We show that initially irregular (quasiperiodic) oscillations that occur as a result of the simultaneous self-excitation of several mechanical modes with incommensurable frequencies self-organize into periodic oscillations with a frequency corresponding to the eigenfrequency of one of the unstable modes. This effect demonstrates that a local probe can selectively excite global vibrations of extended objects.

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BibTeX @article{Jonsson2008,author={Jonsson, L. Magnus and Santandrea, Fabio and Gorelik, Leonid Y. and Shekhter, Robert I. and Jonson, Mats},title={Self-organization of irregular nanoelectromechanical vibrations in multimode shuttle structures},journal={Physical Review Letters},issn={0031-9007 },volume={100},issue={18},pages={186802},abstract={We investigate theoretically multimode electromechanical "shuttle" instabilities in dc voltage-biased nanoelectromechanical single-electron tunneling devices. We show that initially irregular (quasiperiodic) oscillations that occur as a result of the simultaneous self-excitation of several mechanical modes with incommensurable frequencies self-organize into periodic oscillations with a frequency corresponding to the eigenfrequency of one of the unstable modes. This effect demonstrates that a local probe can selectively excite global vibrations of extended objects.},year={2008},keywords={nanoelectromechanics, shuttling, carbon nanotube},}